Just wanted to say that recently the Just Cause II Multiplayer has gone online.
Just Cause II is a physics sandbox 3rd Person Shooter with grappling hooks, I've personally been playing on the Meow(AU) server due to the 'boost' plugin so you can fly tuk tuk's.
Didn't really see a post for it on here, but it's definitely one of my favourite games.
Currently there's no point unless the server has some kind of campaign plugin installed, but flying on grappling hooks and picking up other people on motorbikes in helicopters is fun enough.
Here (http://www.youtube.com/watch?v=EfJesoWLcBw)'s a video of a bunch of people playing it.